function LoginIn() {
    var userName = $("#userName").val();
    var Pwd = $("#Pwd").val();
    var vn = $("#vn").val();
    if (userName == '') {
        $("#errorSpan").html("用户名不能为空！");
        $("#errorSpan").show();
        return false;
    }
    if (Pwd == '') {
        $("#errorSpan").html("密码不能为空！");
        $("#errorSpan").show();
        return false;
    }
    if (vn == '') {
        $("#errorSpan").html("验证码不能为空！");
        $("#errorSpan").show();
        return false;
    }
    $.ajax({
        url: "/UserProfile/MemberLoginValidN.ashx",
        data: { userName: userName, password: Pwd, Identify: vn },
        type: "Post",
        dataType: "json",
        success: function (data) {
            if (data.status == true) {
                $("#errorSpan").html("登录成功！页面刷新中……");
                $("#errorSpan").show();
                var currentUrl = $("#currentUrl").val();
                setTimeout("location.href='" + currentUrl + "'", 2000);
            }
            else {
                $("#errorSpan").html(data.msg);
                $("#errorSpan").show();
                return false;
            }
        },
        error: function () {
            $("#errorSpan").html("登录异常！");
            $("#errorSpan").show();
            return false;
        }
    });
}